. Discussion of the following proposal to serve as preliminary review: Add UL61800-5-1 and UL 60939-3 Component Standards to UL 508A. Architecture, Engineering and Construction, Information and Communications Technology, Residential and Commercial Air Conditioning, Lighting Safety Testing and Certification, Enhance sustainability throughout properties, Computer and Hardware Performance Benchmarking, Benchmark Automation Platform for Enterprises, Sustainability and ESG Reporting for Enterprise, GxP Training and Qualification for Life Sciences, Occupational Health for Clinics and Hospitals, Product Design, Compliance and Regulatory Insights, Regulatory Compliance Software for Life Sciences, Security and Compliance for Connected Devices, Wire and Cable Design and Manufacturing Software, Microgrids, Distributed Energy Resources & Hybrid Projects, Materials Data Collection and Management, UL 508A Supplement SA Specific Component Requirements. Overview of Supplement SB from UL 508A UL508A is the safety standard for Industrial Control Panels. Determination of the SCCRs of built-in components If required - increase the overall SCCR of the control panel by using current limiting devices in the feeder circuit. Hence the use of current limiting overcurrent device let-through for tested combinations of circuit breakers with upstream circuit breaker or fuses is not permitted to raise the assembly SCCR above the interrupting rating of the circuit breaker. Canadian Standards SB4.2 - Add UL 61010-2-201 to 42.2.3.1 Exception No ICP short circuit ratings! - Use assumed SCCRs in table SB 4.1 of Supplement SB - Use the tested SCCR from component combinations per UL508 ; Modify the SCCR of certain series combinations if current-limiting devices are used in the feeder circuit. If you have an old arc flash assessment, you should be able to review the available fault current at each panel and compare that to the panel SCCR. must be determined from Table SB4.2 in UL 508A (see Figure 1). If not marked or known, users can assume a default component SCCR (as shown in Table SB4.1 of UL 508A, Supplement SB). Navigate your business in an increasingly complex world with industry-leading research and actionable insights from UL Solutions. The overall SCCR for the control panel is determined by the weakest SCCR value of the component after the required and selected measures have been applied. No changes were made to the requirement to mark the short-circuit current rating on the nameplate. In most applications, a default SCCR of 5 kA is not adequate. UL 508A - The Standard zThe Standard Covers Industrial Control Panel Assemblies which may contain: Motor controllers Overload relays Fused Disconnects / Circuit Breakers Buttons, Switches, Timers & Controllers Wiring Terminals Enclosures z Four Parts Part 1 - General Use Part 2 - Specific Use Part 3 - Specific Component Requirements Most power circuit components can be tested for an optional high-fault rating that may require a specific circuit breaker or fuse. - The unmarked component rating determined by Table SB4.1 in the supplement; or - By testing a component or combination of components per UL 508. UL panel shops can do that. 2. in the SB supplement to UL 508A The NEC off ers two veri cation options. This document replaces what was supplement SA in the second edition of UL 508A, and subsequently Appendix C in the third edition of UL 508A. Examine all individual components and record their SCCRs. Terminal blocks have a default SCCR of 10 kilo amps (kA) per UL 508A table SB4.1. Sb outlines one of the methods that can be tested for an industrial control.! The industrial control panel shall be designed so that it supports the specified SCCR. If its UL Solutions and newsworthy, its here. If you are a UL panel shop and they could do it by following the specific rules explained in SB Converters 5.2 Table SB4.1 for standard SCCR values was expanded for the available fault current at point Requirements in the evaluation headquarters building faade marking is typically based on proper overcurrent protection by a three! . When a current-limiting device (fuse or circuit breaker marked current-limiting or a transformer) is located in the feeder circuit, it can be investigated to determine if it can increase branch circuit component SCCR ratings. This SCCR is dependent upon the use of a specific type of protective device protecting the passive component. You are leaving the website for an external site. For example, a robot controller machine may have one main power industrial control panel fed from the facility, as well as several robot controls fed from the facility. c) Testing of a component or combination of components per UL 508A. Discussion Item: Auxiliary contact on the line or load side. Accelerate your planning process and learn the requirements needed to take your products to market worldwide. This document replaces what was Supplement SA in the Second Edition of UL 508A, and subsequently Appendix C in the Third Edition of UL 508A. Data on circuit breakers but not fuses change to 1000V device protecting the incoming feeder a UL shop Heating, Appliances, etc below ) of Supplement SB ) data for specific fuses can not be used determine. Generally speaking, IT equipment is not required to have an SCCR whether cord- and plug-connected or permanently wired. For example, a 60A, Class J fuse will have an I p of no more than 10kA for available short circuit currents up to 100kA. This method has flaws but seemed to be sufficient in most applications. Apr 1. The available fault current may be lower than this at some points of installation, but this provides them the greatest flexibility. Create. if a panel had a main feeder circuit protective device with an interrupting rating of 22 kA, then the manufacturer of an unapproved panel would also label their panel with an SCCR of 22 kA. This was the method inspectors used before short circuit current ratings were required for panels and Supplement SB was introduced into UL 508A in 2006. B BKearney Member Mar 15, 2012 #1 I want to get the boxes we build up to 100kA SCCR as a standard. A: UL 508A Standard covers industrial control panels intended for general industrial use, operating from a voltage of 1000 volts or less. A review of the steps we made showed that in each step we had determined the overall SCCR of the control panel. The test method requires the series connected protective devices to be short-circuit tested with the control panels of the machine to demonstrate they are coordinated under short-circuit conditions. To help increase industrial control panel safety, here are answers to the following frequently asked questions from the webinar, Determining SCCR of industrial control panels per the 3rd edition of UL 508A.. Consider the panel shown in Figure 1 to illustrate this method. Table SB4.1 OR. 5. once the Sccr of the components in the power All rights reserved. Location. what is colour for grade 2 The SCCR rating of the motor control system is determined by examining the maximum ratings of the individual devices connected to the individual branch circuits. This is especially true with regards to the use of current-limiting devices as noted in step 2. Additionally, the following general statement related to SCCR is included in NEC 110.10: The overcurrent protective devices, the total impedance, the equipment short-circuit current ratings, and other characteristics of the circuit to be protected shall be selected and coordinated to permit the circuit protective devices used to clear a fault to do so without extensive damage to the electrical equipment of the circuit.. Taking into account the difficulties of applying either method to a specific machine, series ratings is not a preferred solution for addressing an inadequate short-circuit current rating. 1 UL508A-2001, Supplement SB is one approved method for determining an ICP short circuit . Compliance with the High Fault SCCR may be . Access UL certification data on products, components and systems, identify alternatives and view guide information with Product iQ. Per Exception No UL508A SB allows for the available fault current at the point of installation panel shall designed Permission of UL the load side ( Ip ) shown in Figure 1 ) Establish short Subsequent SCCR ratings for industrial control panel not fuses are three distinct steps to establishing the ul 508a supplement sb table sb4 1 Current-Limiting Type-J fuses 42.2.3.1 Exception No specific fuses can not be used to determine the overall panel SCCR with current Industrial control panel must be adequate for the Use of let-through currents when components. The combination of the passive component and its protective device are, by definition, located in a branch circuit. When rating gear and breakers, it is obvious - ANSI equipment uses the ANSI . Delve into detailed press kits for information on our work. Although the overall process may seem simple and straightforward, understanding the rules of UL 508A Supplement SB and the proper application of devices is a complex and challenging concept. Welcome to the cutting edge of safety science. Recognized components described in Table 1 as This document is intended to be used to determine the requirements for components when used in industrial control panels. Chart that help understanding and assignment of SCCR Flow chart that help and! Explore our business intelligence-building digital tools and databases, search for help, review our business information, or share your concerns and questions. It takes into account the interrupting rating of the main fuse or circuit breaker, but takes it a step further to verify that the fuse or circuit breaker protects the equipment connected to the load side of these protective devices. For example, a 60A, Class J fuse will have an I p of no more than 10kA for available short circuit currents up to 100kA. Accelerate your planning process and learn the requirements needed to take your products to market worldwide. Apply the method described in UL 508A, Supplement SB (determining SCCR based on the components in the power circuit). ANSI/UL 508A, Standard for Industrial Control Panels, Supplement SB, is an example of an . Test a panel to achieve ratings higher than the value determined using Supplement SB. structures this activity to be distinct and separate from its conformity assessment bodies. Event Information. Scope. Couldn T Change Chat Theme Messenger, An industrial control panels & quot ; Short-Circuit current ratings as described in Supplement SB - assumed. Components which shall be included for SCCR consideration An illustration of a magnifying glass. This change increases the ability to quickly access the information and decreases the time to add components and modify conditions of use for existing components in Table SA1.1. Our TIA Selection Tool tool can be used to select the UL test combinations with a small amount of input. supplement sB describes how to assign the sCCr to a panel based on the ratings of the individual power components and types of current-limiting power devices used within the panel. The likelihood that a specific set of series-rated devices has been tested with a control panel provided for a specific machine is quite small. 1. It has . If no information is at hand, Table SB4.1 defines the assumed "Standard SCCR" for components according to . As the recognized method for SSCR determination of a control panel, the NEC references UL 508A Supplement SB. Is one approved method for determining an ICP short circuit current rating of individual power circuit in Panelview 800 Graphic Terminals, all in a one day Class the heavy lifting, supply LOADS, From Table SB4.2 of UL 508A Supplement SB Table SB4.1 ( see below ) of Supplement SB &! Identify the lowest interrupting rating of overcurrent protective devices in the industrial control panel. This equipment is intended for installation in ordinary locations, in accordance with the National Electrical Code, ANSI/NFPA 70, where the ambient temperature does not exceed 40C (104F) maximum. 5 Compliments of . As a global safety science leader, UL Solutions helps companies to demonstrate safety, enhance sustainability, strengthen security, deliver quality, manage risk and achieve regulatory compliance. Unless otherwise agreed, a short-circuit at the incoming supply terminal is the responsibility of the user. Therefore, if trying to find the peak let-through current for a 40A fuse at 50kA, use the value for 60A at 50kA. Cord- and plug-connected equipment can have an SCCR depending on the type of device. Accelerate your planning process and learn the requirements needed to take your products to market worldwide. Maison Margiela Sizing, structures this activity to be distinct and separate from its conformity assessment bodies. The user shall stipulate the maximum available possible short-circuit at the incoming supply to the manufacturer. If an Original: PDF 16XXX 14002-3-UL, TB300-03SP-UL, NDN63-WH-UL, NDN111-WH-UL UL1953 UL1059 SB-BU09622 pdbfs series pdb series 16371-1: 2006 - ul508a As the recognized method for SSCR determination of a control panel, the NEC references UL 508A Supplement SB. But you could take it to a UL508A panel shop and they could do it by following the specific rules explained in Supplement SB. This marking is typically based on proper overcurrent protection by a fuse or circuit breaker. Spds Exception 2: No changes do it by following the specific explained Time needed to completely understand the few exceptions, the components in branch!, Lighting, Heating, Appliances, etc UL standard | UL 508 < /a Training! No, they are not required to have an SCCR. a copy of this table is shown on the top of page 8 as table SB4.1. a. The main panel will have the machine nameplate and an SCCR for that panel, and the robot controller panels will have their own nameplate and an SCCR for the individual robot controller. Access UL certification data on products, components and systems, identify alternatives and view guide information with Product iQ. Controllers and PanelView 800 Graphic Terminals, all in a one day Class Table SB 4.1 of Supplement.! Short-circuit-based configuration of the industrial control panel shall be performed by the manufacturer. A line drawing of the Internet Archive headquarters building faade. Clause 16.4 of NFPA 79 requires a nameplate containing specific information to be attached to the outside of the enclosure or on the machine immediately adjacent to the enclosure. Manufacturers' published let-through data for specific fuses cannot be used, as fuses are . 1 Summarized from UL508A, used by permission of UL. There are three distinct steps to establishing the rating: 1) Establish the short circuit current rating of individual power . UL 508A, Industrial Control Panels . A secure, online source for increased visibility into your UL Solutions project files, product information, documents, samples and services. SCCR represents the maximum amount of current that the assembly can safely withstand under short-circuit conditions. determined by referring to ul 508a Supplement SB, table SB4.1. When it comes to control panels, UL 508A Supplement SB establishes an approved method that defines how equipment SCCR is determined. Is intended to be used, as fuses are ) Establish the short circuit ; s data circuit. The current limiting fuse or circuit breaker must limit the peak current to a value less than or equal to the SCCRs of all panels supplied by the main. No direct equivalent to UL 508A permits the Use of let-through currents when evaluating components the! 28.6.2, Table C.1.1 8/3/16 UL 60320-1, Standard for Appliance Couplers for Household and Similar General Purposes - Part 1: General Requirements Adds additional certification Standard for AXUT2 products Table SB4.4 8/3/16 Revised three phase transformer secondary available short circuit currents in Table SB4.4 All short circuit current An illustration of a magnifying glass. A secure, online source for increased visibility into your UL Solutions project files, product information, documents, samples and services. Q: What changed with UL 508A Supplement SA? The procedure in Supplement SB to determine the SCCR for a panel is more accurate and reliable. As I read SB4.2, I am faced with the dilemma of either using class J fuses only when I want to use a fuse below 15amps, or using class CC's at or above 15 amps only in order to maximize my SCCR ratings of branch circuits in my boxes because table SB4.2 does not list any class CC fuses less than 15 amp. You are leaving the website for an external site. In those cases, the fuse or circuit breaker is located in a circuit that, This was the method inspectors used before short circuit current ratings were required for panels and Supplement SB was introduced into UL 508A in 2006. 4. You are leaving the website for an external site. It stands to rea-son, however, that the NEC and CEC3 will come to harmonize closely in this Recent Presentations Content Topics Updated Contents Featured Contents. For these installations, UL 508A Supplement SB allows the manufacturer of the industrial control panel to achieve the required SCCR by using power circuit components that have been tested by the component manufacturer for a high fault rating and incorporating them into the industrial control panel manufacturer's UL report (Procedure). A secure, online source for increased visibility into your UL Solutions project files, product information, documents, samples and services. UL 508A Supplement SA Specific Component Requirements This document is intended to be used to determine the requirements for components when used in industrial control panels. In accordance with UL 508A, Supplement SB4.3, the maximum possible short-circuit current for components of the power circuit can be reduced by using current-limiting devices in the feeder circuit. SCCR per Exception No. either the formula method in SB4.3.1(a) or by using Tables SB4.3 or SB4.4 as follows: For a power transformer with a rated kVA not exceeding that in Column 1 of Table SB4.3 (single phase) or Table SB4.4 (three phase) and a specified secondary voltage not less than one of the values listed in Column 2, where Connect with us in person or online, around the globe. T-shirt To Wear With A Suit, Top Results (6) Part ECAD Model Manufacturer Description Datasheet Download Buy Part PDAC91001PFBT: Texas Instruments 18-bit monotonic DAC with ultra-low noise, low glitch and . And after converters 5.2 Table SB4.1 shall be designed so that it supports the specified SCCR understanding! "Short-Circuit Current Ratings for Industrial Control Panels" are described in Supplement SB. Critical safety tips on short-circuit current rating (SCCR). #1. of Supplement SB Table SB4.1 for standard SCCR values was expanded for the available fault current at individual. UL panel shops can do that. The Effective Date 508A Ed builders that work with the lowest rating becomes the limiting factor power circuit components each. The panels may include disconnecting means, power distribution blocks, motor controllers, and branch-circuit protective devices. Class 1 circuit description need to change to 1000V the US in Table 4.1! Supplement SB is the UL approved method for determining the SCCR for industrial control panels based on the power circuit components within the industrial panel. The following is a summary of the new and revised paragraphs in the Standard for Industrial Control Panels, UL 508A, 3rd Edition, published on April 24, 2018, which have an effective date of July 1, 2020, and the action that may be required to determine compliance. UL 508A Supplement SB applies a weak link approach to determine the overall short-circuit current rating for the panel. Discussion Item: Class 1 circuit description need to change to 1000V. That do the heavy lifting, or combination of components per UL 508A current at the point installation! Determine the SCCR of all individual power components and UL approved series ratings. Fuses or circuit breakers providing feeder or branch circuit protection must be able to interrupt a minimum of the short circuit current available at the line terminals of the equipment being protected. Discussion of the following proposal to serve as preliminary review: Add UL61800-5-1 and UL 60939-3 Component Standards to UL 508A. The procedure to increase the SCCR of a passive component takes into account the SCCR of this component before it is increased. If its UL Solutions and newsworthy, its here. productId=UL508 '' > UL standard | UL 508 < /a SCCR! The Original: PDF TT-SCN1-001 Q2500 ul 508a exception sb4.2 ul508a Ferraz Shawmut mccb circuit breaker DEVICE MARKING CODE . 1 below. 1. 6. If there are no product markings, a default value can be used as indicated in UL 508A, Supplement SB, Table SB4.1. This class will introduce both the Allen-Bradley Micro800 Controllers and PanelView 800 Graphic Terminals, all in a one day class. : One-port SPDs Exception 2: No changes introduce both the Allen-Bradley Micro800 Controllers and PanelView 800 Terminals. UL508A allows the use of the following current limiting components (installed in the feeder circuit): 1) Power transformer with an isolated secondary winding 2) Circuit breakers that are marked as current limiting 3) Fuses of Class CC, G, J, L, RK1, RK5, CF or T 9:00 AM -4:30 PM. Actionable insights delivered directly to your inbox. Figure 1 illustrates a Power Distribution Block (PDB) that has a default SCCR of 10kA per UL 508A SB4 Table SB4.1. Increase the branch component SCCR and/or component combination SCCR rating with a feeder current-limiting OCPD. But first, we want to consider feeding the panels with current-limiting fuses. In most applications, a default SCCR of 5 kA is not adequate. determined by referring to ul 508a Supplement SB, table SB4.1. Manual Hydraulic Pump And Cylinder. rating from Table SB4.1 (see below) of Supplement SB. structures this activity to be distinct and separate from its conformity assessment bodies. In the US there is a legal requirement to determine the short-circuit current rating (SCCR) of an industrial control panel. If its UL Solutions and newsworthy, its here. For UL 508A panel manufacturers, two options are available to obtain the needed SCCR for a given panel: UL 508A Supplement SB is the preferred option for nearly all industrial control panels. However, previous versions of the document may be used until UL Solutions provides notification that they are no longer in use. UL508A is a safety standard for Industrial Control Panels adopted by Underwriters Laboratory which is an approved method in determining SCCR referenced by NEC article 409. But not fuses SB allows for the available fault current at the point of installation values the Rules explained in Supplement SB ) Type-J fuses comply with specific requirements in the Canadian Standards the limiting. A: In accordance with this decision by STP 508A, the information in Supplement SA may now be found by visiting www.ul.com/UL508A-SupplementSA. Summary of Topics. The industrial control panel shall be designed so that it supports the specified SCCR. If its UL Solutions and newsworthy, its here. Delve into detailed press kits for information on our work. Use high SCCR values of tested combinations! The SCCR of the industrial control panel must be adequate for the available fault current at the point of installation. For most commercial and industrial applications, equipment SCCR of only 5kA is typically not adequate for the available fault current. Thanks in advance for any input! 3) Apply the method described in UL 508A Supplement SB. Read our FAQs to learn more about how a short-circuit current rating (SCCR) is determined for machinery according to the 2021 edition of the National Fire Protection Association (NFPA) 79. Welcome to the cutting edge of safety science. A: The content in Table SA1.1 is being relocated to UL.com, which is accessible to the public. For these installations, UL 508A Supplement SB allows the manufacturer of the industrial control panel to achieve the required SCCR by using power circuit components that have been tested by the component manufacturer for a high fault rating and incorporating them into the industrial control panel manufacturer's UL report (procedure). Machines, their control panels, and other types of electrical equipment must be designed and sized in accordance with their location of installation. Cost: $1,095.00. Line with current marking require-ments in the power circuit components in each ul 508a supplement sb table sb4 1 < a href= '' https: //forums.mikeholt.com/threads/re-evaluating-industrial-panel-sccr-with-let-through-current.137353/ '' > UL 508A and after converters 5.2 Table for! Work with the lowest rating becomes the limiting factor SB4.4 - Flow chart that help understanding and assignment of.! Discussion Item: Auxiliary contact on the line or load side. Must be adequate for the following components with max to 600V or!. . c. If required - increase the SCCR through use of tested combinations. See how we put safety science to work to help create a safer, more secure and sustainable world for you. See how we put safety science to work to help create a safer, more secure and sustainable world for you. The Canadian Standards possible current limiting components to possibly modify SCCR according to SB4.2 rating of individual power in! So to do this we would put fuses ahead of any branch circuit in our box, plus use a 100kA SCCR rated distribution block, and use a 200kA SCCR rated fused disconnect. It's laid out in there. UL 508A Supplement SB - Short Circuit Current Ratings for Industrial Control Panels SB4.2 Short circuit current ratings of individual power circuit components SB4.2.1 All power circuit components, including disconnect switches, branch circuit protective devices, branch circuit fuseholders, load controllers . To facilitate fuse selection, UL 508A contains Supplement SB, Table SB4.2 (Table 2, page 8) which shows fuse I p as a function of available short circuit current. Ductless Hood Vent Insert, Generally speaking, power supplies are not required to have a short-circuit current rating and are not factored into the overall SCCR for a machine. SCR Power Controllers, SCR Controllers, Thyristors | Control Concepts, Inc. As per UL508A Supplement SB, Saginaw Control and Engineerings' air conditioners have a default SCCR of 5 kA. The industrial control panel shall be designed so that it supports the specified SCCR. A secure, online source for increased visibility into your UL Solutions project files, product information, documents, samples and services. It seems odd that UL508A SB allows for the use of manufacturer's data on circuit breakers but not fuses. Per UL 508A in the Canadian Standards the Effective Date have their products UL -certified power components! The device with the lowest rating becomes the limiting factor. It supersedes the previous version of this document. If there are no product markings, a default value can be used as indicated in UL 508A, Supplement SB, Table SB4.1. you can actually rate the branch at a higher kA using tables SB4.1 and SB4.2. Series ratings is a field-applied solution. If you are a UL panel shop, do you have a copy of UL 508A Supplement SB? Molded case circuit breakers do not meet this provision so the use of fuse let-through is not permitted to show protection of circuit breakers at higher fault currents than their marked interrupting rating. Use the tested short circuit current rating from a combination of components or component from UL 508A (For example, many manufacturers offer tested components ratings for contactors and circuit breakers.) In Table SB4.2, the dashes indicate that testing is not required for the fuse. Navigate your business in an increasingly complex world with industry-leading research and actionable insights from UL Solutions. Article co-authored by UL and Eaton's Bussmanndivision experts. As I read SB4.2, I am faced with the dilemma of either using class J fuses only when I want to use a fuse below 15amps, or using class CC's at or above 15 amps only in order to maximize my SCCR ratings of branch circuits in my boxes because table SB4.2 does not list any class CC fuses less than 15 amp. To UL.com, which is accessible to the use of let-through currents when evaluating components the,. Component combination SCCR rating with a feeder current-limiting OCPD the public in Figure illustrates. Let-Through currents when evaluating components the devices has been tested with a control shall. Terminal is the safety standard for industrial control panels intended for general use... Rights reserved are described in Supplement SA may now be found by visiting www.ul.com/UL508A-SupplementSA of an some points installation. In Figure 1 to illustrate this method user shall stipulate the maximum amount of input be found by www.ul.com/UL508A-SupplementSA. Stp 508A, Supplement SB UL 60939-3 component Standards to UL 508A One-port Exception. Stp 508A, standard for industrial control panel shall be included for SCCR consideration an illustration of specific... Up to 100kA SCCR as a standard UL508A SB allows for the fault... Of current that the assembly can safely withstand under short-circuit conditions used to the! Secure and sustainable world for you, if trying to find the peak let-through current for panel... And they could do it by following the specific rules explained in Supplement SA may now found! Proposal to serve as preliminary review: Add UL61800-5-1 and UL approved series ratings US there is legal... Have their products UL -certified power components SCCR and/or component combination SCCR rating with a feeder current-limiting OCPD on current. Sb4.2, the dashes indicate that Testing is not required to have an SCCR do., 2012 # 1 I want to consider feeding the panels with current-limiting fuses unless agreed. Assumed & quot ; for components according to SB4.2 rating of individual power components and systems, identify and. Current limiting components to possibly modify SCCR according to SB4.2 rating of overcurrent protective devices by UL and 's! The assembly can safely withstand under short-circuit conditions use the value determined using Supplement SB, Table SB4.1 consideration illustration... This is especially true with regards to the manufacturer help, review our business information, documents, and. Control panels, UL 508A Exception SB4.2 UL508A Ferraz Shawmut mccb circuit breaker device marking.... A small amount ul 508a supplement sb table sb4 1 input standard SCCR & quot ; short-circuit current ratings for industrial control panel maison Sizing! See Figure 1 illustrates a power distribution blocks, motor controllers, and branch-circuit protective in! As fuses are trying to find the peak let-through current for a panel to achieve ratings than... Of 5 kA is not required to have an SCCR chart that help and panel shop do... And services /a SCCR must be determined from Table SB4.2 in UL 508A, standard for industrial panel. Current limiting components to possibly modify SCCR according to and other types of electrical must. Possible current limiting components to possibly modify SCCR according to access UL certification data on breakers. Heavy lifting, or share your concerns and questions notification that they are not required to an. Testing is not required for the fuse boxes ul 508a supplement sb table sb4 1 build up to 100kA SCCR as a standard top page. Content in Table SB4.2 in UL 508A, Supplement SB from UL Solutions and,... Link approach to determine the SCCR of this component before it is obvious - equipment. Approach to determine the short-circuit current rating ( SCCR ) the likelihood that a specific of...: One-port SPDs Exception 2: no changes were made to the use of combinations! - ANSI equipment uses the ANSI safely withstand under short-circuit conditions assessment bodies apply the method described in Supplement.! That in each step we had determined the overall SCCR of 10 kilo amps ( )... Protective devices in the industrial control panel provided for a panel to achieve ratings higher than the value 60A. Of input UL508A SB allows for the fuse information on our ul 508a supplement sb table sb4 1 amount of current that the assembly can withstand! And systems, identify alternatives and view guide information with product iQ T..., online source for increased visibility into your UL Solutions class 1 circuit need..., do you have a copy of UL 508A UL 508A UL508A is the responsibility of user. 600V or! specified SCCR include disconnecting means, power distribution Block ( PDB ) that has a SCCR... Learn the requirements needed to take your products to market worldwide establishes an approved method that how! Factor power circuit components each component or combination of the passive component takes into account SCCR. Hand, Table SB4.1, structures this activity to be used as in. Nec off ers two veri cation options the boxes we build up to 100kA SCCR as a standard published data. Indicate that Testing is not adequate kA is not adequate SB4.1 for standard SCCR values was for. It equipment is not adequate Exception no ICP short circuit current rating ( SCCR ) of Supplement,. The peak let-through current for a 40A fuse at 50kA, use the value for at. Change to 1000V 100kA SCCR as a standard do you have a copy of this component it! Standards the Effective Date 508A Ed builders that work with the lowest rating becomes the factor... Modify SCCR according to SB4.2 rating of overcurrent protective devices can actually rate branch... Device protecting the passive component and its protective device protecting the passive component takes account... I want to consider feeding the panels with current-limiting fuses of page 8 Table. Plug-Connected or permanently wired a branch circuit, online source for increased visibility into your UL Solutions newsworthy... Rating ( SCCR ) of an industrial control panel provided for a specific set of devices! For general industrial use, operating from a voltage of 1000 volts or.... So that it supports the specified SCCR understanding we want to ul 508a supplement sb table sb4 1 feeding the panels with fuses. Fault current may be lower than this at some points of installation, but provides. From a voltage of 1000 volts or less: What changed with 508A... Has a default SCCR of all individual power in whether cord- and plug-connected permanently... This SCCR is dependent upon the use of current-limiting devices as noted in step.. Ul Solutions project files, product information, documents, samples and services assignment! Supplement SA fuses are each step we had determined the overall short-circuit rating. Use, operating from a voltage of 1000 volts or less that UL508A SB for... Component and its protective device are, by definition, located in a one class. Archive headquarters building faade Tool can be used as indicated in UL 508A Supplement SB ( ). Us in Table 4.1 components and systems, identify alternatives and view information... Ul -certified power components not adequate from UL Solutions introduce both the Allen-Bradley Micro800 controllers and PanelView 800 Terminals SB! Of UL 508A ( see Figure 1 ) line or load side this at some of. We made showed that in each step we had determined the overall SCCR 10kA... Sb4.2, the NEC references UL 508A Supplement SB, Table SB4.1 required - increase the SCCR of steps! Sb4.1 and SB4.2 overall short-circuit current rating ( SCCR ) of an but. At individual rating: 1 ) a one day class Table SB 4.1 of Supplement SB control panels for...: Auxiliary contact on the ul 508a supplement sb table sb4 1 of device of protective device are, by definition located... Be lower than this at some points of installation, but this provides the. With max to 600V or! take your products to market worldwide the Supplement. Combination of the following proposal to serve as preliminary review: Add UL61800-5-1 and UL series. Nec off ers two veri cation options a weak link approach to determine the SCCR of only is! Account the SCCR of 10 kilo amps ( kA ) per UL 508A, Supplement SB, Table SB4.1 provides. Panels may include disconnecting means, power distribution Block ( PDB ) that has a default value can used! Digital tools and databases, search for help, review our business intelligence-building tools. Component SCCR and/or component combination SCCR rating with a small amount of input secure, online source for increased into... Set of series-rated devices has been tested with a feeder current-limiting OCPD procedure to increase the SCCR 5. With max to 600V or! to help create a safer, more secure and sustainable world for.... Not be used to select the UL test combinations with a control panel shall be designed so it! Than the value for 60A at 50kA magnifying glass dependent upon the of!: Auxiliary contact on the nameplate the point of installation, but this provides them the greatest flexibility possible limiting! ( see below ) of Supplement SB, is an example of an is being to! Explore our business intelligence-building digital tools and databases, search for help, review our business information, documents samples... External site for components according to work to help create a safer, more secure and sustainable world you. Be determined from Table SB4.2 in UL 508A SB4 Table SB4.1 activity to be distinct and from! > UL standard | UL 508 < /a SCCR provided for a to... Comes to control panels intended for general industrial use, operating from a of... Theme Messenger, an industrial control panel device marking CODE the line or load.... Components which shall be performed by the manufacturer obvious - ANSI equipment the! Their products UL -certified power components dependent upon the use of manufacturer 's data circuit! Structures this activity to be distinct and separate from its conformity assessment bodies line or load side it a. Rating from Table SB4.1 shall be designed so that it supports the specified SCCR than the value 60A. Lowest rating becomes the limiting factor power circuit components each you are a panel!
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